not active

an inactive volcano.

sedentary or passive

an inactive life.

sluggish; indolent.

Military . not on active duty.

Chemistry .

inert; unreactive.

noting a compound that has no effect on polarized light.

adjective

active , busy , involved , working

adjective

abeyant , asleep , blah * , disengaged , do-nothing * , dormant , down , draggy , dull , idle , immobile , indolent , in holding pattern , inoperative , jobless , latent , lax , lethargic , limp , low-key , mothballed , motionless , on hold , ossified , out of action , out of commission * , out of service , out of work * , passive , quiescent , quiet , sedentary , slack , sleepy , slothful , slow , sluggish , somnolent , stable , static , still , torpid , unemployed , unoccupied , unused , inert , vacant , sleeping , at rest , dilatory , in abeyance , languid , otiose , stagnant , supine